共查询到19条相似文献,搜索用时 234 毫秒
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有交易成本的模糊最优化投资 总被引:1,自引:0,他引:1
本文针对交易成本在证券组合投资中的重要地位 ,提出了考虑交易成本 ,并兼顾收益与风险的模糊最优化投资模型 ,分析了交易成本对投资有效边界的影响 ,并给出了最优投资比例公式 .这对投资者进行投资有重要的理论与实践意义 .最后 ,通过释例进行了说明 . 相似文献
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本文利用均值方差模型,分析了非线性交易成本下的共同资金投资的有效边界和在一般的效用函数下讨论了最优投资组合和最大效用,其中只考虑风险资产的总投资比例对交易成本的影响. 相似文献
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具有交易成本的证券组合投资决策研究 总被引:2,自引:0,他引:2
本文利用均值-方差模型,分析了有交易成本的证券投资组合的决策问题,给出了风险资产和无风险资产的最优投资比例与交易成本关系的一个有意义的结论。 相似文献
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含有资本结构因子、交易成本和风险偏好的模糊最优化投资模型 总被引:1,自引:0,他引:1
李宏杰 《数学的实践与认识》2008,38(21)
建立了含有资本结构因子、交易成本和风险偏好的模糊最优化投资模型,在允许卖空条件下,给出最优投资策略及有效边界;在不允许卖空条件下,给出了确定其有效边界的算法,并分析了风险偏好、无风险利率和交易成本对有效边界的影响,最后通过示例进行了分析. 相似文献
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有交易成本的回望期权定价研究 总被引:2,自引:0,他引:2
基于标的资产价格的几何布朗运动假设,Black—Seholes模型运用连续交易保值策略成功解决了完全市场下的欧式期权定价问题。然而,在实际的金融市场中,存在着数量可观的交易成本。本文主要研究了在不完全市场下有交易成本的回望期权的定价问题,并且利用Ito公式,得到了在该模型下期权价格所满足的微分方程。 相似文献
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研究了有交易成本的分形Black-Scholes外汇期权定价问题.基于汇率的分形布朗运动分布假设,运用分形布朗运动的性质和随机微积分方法,得到了欧式外汇期权价格所满足的偏微分方程.最后,建立离散时间条件下的非线性期权定价模型,并且通过解期权价格的偏微分方程给出了有交易成本的欧式外汇期权定价公式. 相似文献
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含有交易成本的均值-方差-偏度资产组合优化模型 总被引:2,自引:0,他引:2
提出了含有交易成本的均值 -方差 -偏度资产组合优化模型 ;结合一个非对称性收益分布的具体例子 ,对模型做了灵敏度分析 . 相似文献
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一类灰色组合投资决策方法 总被引:1,自引:0,他引:1
以灰色系统理论和概率论为基础,探讨了含有区间灰数的组合投资决策问题,提出了具有交易费用的灰色组合投资模型的有效解及其临界最优解和均值白化最优解的概念.并且指出了这些概念所对应的投资偏好.利用分析方法和技巧,融合经典组合投资理论,构建了带有交易费用的灰色组合投资模型的熵权分析算法.为不确定型组合投资决策方法的研究提出了一条新思路.文中的算例说明了算法的可行性. 相似文献
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The original Markowitz model of portfolio selection has received a widespread theoretical acceptance and it has been the basis for various portfolio selection techniques. Nevertheless, this normative model has found relatively little application in practice when some additional features, such as fixed costs and minimum transaction lots, are relevant in the portfolio selection problem. In this paper different mixed-integer linear programming models dealing with fixed costs and possibly minimum lots are introduced. Due to the high computational complexity of the models, heuristic procedures, based on the construction and optimal solution of mixed integer subproblems, are proposed. Computational results obtained using data from the Milan Stock Exchange show how the proposed heuristics yield very good solutions in a short computational time and make possible some interesting financial conclusions on the impact of fixed costs and minimum lots on portfolio composition. 相似文献
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J J Glen 《The Journal of the Operational Research Society》2011,62(4):667-676
Investment portfolios should be rebalanced to take account of changing market conditions and changes in funding. Standard mean-variance (MV) portfolio selection methods are not appropriate for portfolio rebalancing, as the initial portfolio, change in funding and transaction costs are not considered. A quadratic mixed integer programming portfolio rebalancing model, which takes account of these factors is developed in this paper. The transaction costs in this portfolio rebalancing model are composed of fixed charges and variable costs, including the market impact costs associated with large market trades of individual securities, where these variable transaction costs are assumed to be non-linear functions of traded value. The use of this model is demonstrated and it is shown that when initial portfolio, funding changes and transaction costs are taken into account in portfolio construction and rebalancing, MV efficient portfolios that include risk-free lending do not have the structure expected from portfolio theory. 相似文献
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Portfolio optimization with linear and fixed transaction costs 总被引:1,自引:0,他引:1
We consider the problem of portfolio selection, with transaction costs and constraints on exposure to risk. Linear transaction
costs, bounds on the variance of the return, and bounds on different shortfall probabilities are efficiently handled by convex
optimization methods. For such problems, the globally optimal portfolio can be computed very rapidly. Portfolio optimization
problems with transaction costs that include a fixed fee, or discount breakpoints, cannot be directly solved by convex optimization.
We describe a relaxation method which yields an easily computable upper bound via convex optimization. We also describe a
heuristic method for finding a suboptimal portfolio, which is based on solving a small number of convex optimization problems
(and hence can be done efficiently). Thus, we produce a suboptimal solution, and also an upper bound on the optimal solution.
Numerical experiments suggest that for practical problems the gap between the two is small, even for large problems involving
hundreds of assets. The same approach can be used for related problems, such as that of tracking an index with a portfolio
consisting of a small number of assets. 相似文献
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The solution to the intertemporal optimal portfolio selection and consumption rule with small transaction costs is derived via the use of perturbation analysis for the two assets portfolio, one risky and one riskfree. This methodology allows us to apply a broader specification for the function of utility. The additional feature of stochastic variance is also included. 相似文献
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本文建立带手数约束和凹交易费的离散投资组合模型,给出求解该模型的一种精确算法。该算法是一个基于拉格朗日松弛和次梯度对偶搜索的分枝定界算法。为测试算法的有效性,用随机产生的数据对模型进行数值实验。作为其应用,用沪深300指数的真实数据实证检验该模型,并与不含交易费用的离散投资组合模型进行数值比较分析。数值分析表明算法能在合理的时间内给出模型的投资组合策略, 对解决中小规模的离散投资组合问题是有效的。 相似文献
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Perturbation solution of optimal portfolio theory with transaction costs for any utility function 总被引:1,自引:0,他引:1
The solution to the optimal portfolio selection and consumptionrule with small transaction costs is derived via the use ofperturbation analysis for the case when one risky and one risklessasset are available for investment. This methodology allowsus to apply a broader specification for the utility function. 相似文献
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张鹏 《数学的实践与认识》2011,41(15)
将动态风险度量方法运用到多阶段投资组合中,提出了具有交易成本和交易量限制的均值—动态VaR多阶段投资组合模型,并运用自创算法——离散近似迭代法求解.方法的基本思路为:首先,将模型中的连续型状态变量离散化,并将上述模型转化多阶段赋权有向图,然后,运用极大代数求出起点至终点的最长路程,即获得模型的一个可行解;最后,以该可行解为基础,继续迭代直到前后两个可行解非常接近.证明了该方法的收敛性,并以一个具体的算例,验证了该算法可以较快地计算出不同终期财富所对应的最优投资策略. 相似文献